You might well decide to let a security service that you trust
remotely deactivate programs that it considers malicious.
But there is no excuse for deleting the programs, and you
should have the right to decide who (if anyone) to trust in this way.

As these pages show, if you do want to clean your computer of malware,
the first software to delete is Windows or iOS.

Google can also
forcibly and remotely install apps through GTalkService (which seems,
since that article, to have been merged into Google Play). This adds up to
a universal back door.

Although Google's exercise of this power has not been
malicious so far, the point is that nobody should have such power,
which could also be used maliciously. You might well decide to let a
security service remotely deactivate programs that it
considers malicious. But there is no excuse for allowing it
to delete the programs, and you should have the right to
decide who (if anyone) to trust in this way.

HP “storage appliances” that use the proprietary
“Left Hand” operating system have back doors that give
HP
remote login access to them. HP claims that this does not give HP
access to the customer's data, but if the back door allows installation of
software changes, a change could be installed that would give access to the
customer's data.